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Finding the Fourth Proportional to 139,636.44, 207,875.43 and 138,806.19

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Solution

The fourth proportional to 139,636.44, 207,875.43 and 138,806.19 is: 206,639.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,636.44 : 207,875.43 = 138,806.19 : x
  2. Step 2: Convert to fraction form
    139,636.44/207,875.43 = 138,806.19/x
  3. Step 3: Cross multiply
    139,636.44x = 207,875.43 × 138,806.19
  4. Step 4: Simplify right side
    139,636.44x = 28,854,396,432.91
  5. Step 5: Solve for x
    x = 28,854,396,432.91/139,636.44
  6. Step 6: Final answer
    x = 206,639.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.